It is possible to dig in too much with the fretting hand. I used to do this on Billy Jean. Guaranteed hand cramp. Occasionally, set two will start with Boogie Oogie Oogie > Groove is in the Heart > Billy Jean, sometime with no break in between each song. If I don't relax right from the start, there's no way to get through all three.
Part of my practice routine is seeing how long I can play a repetitive groove till I can't take it anymore.
Part of my practice routine is seeing how long I can play a repetitive groove till I can't take it anymore.

